from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Measurement of the properties of light, especially luminous intensity.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the measurement of various aspects of light, especially its intensity
  • n. the measurement of the intensity and spectrum of light from stars

from the GNU version of the Collaborative International Dictionary of English

  • n. That branch of science which treats of the measurement of the intensity of light.

from The Century Dictionary and Cyclopedia

  • n. The measurement of the relative amounts of light emitted by different sources.
  • n. Measurement of the amount of insufficiency of the external muscles of the eye; the scientific use of the phorometer.
  • n. In biology, the reactional movement, positive and negative, with an indifference point between, of organisms under changing intensity of illumination.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. measurement of the properties of light (especially luminous intensity)


Sorry, no etymologies found.


  • Christie: There are lots of ways you can get involved in observational astronomy, but in talking about photometry, which is a measurement of star brightness, you basically just need a telescope with as much aperture as you can afford.

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  • That's called photometry, and that's primarily what we do.

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  • Despite ill health, she rose to become the head of stellar photometry at the prestigious Harvard College Observatory.

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  • The mistery of the hue divisions is part of what fascinates me, and I'd like to confirm if I'm right about the least-difference value scale (or if it was a middle-value one), or what I think I got regarding the use of the color-tops (instead of photometry).

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  • The worry was not about the pipeline itself, which by then Robert Lupton was writing and which was working beautifully, but about precision of the photometry going into it.

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  • Comparisons of spore dosimetry and spectral photometry of solar-UV radiation at four sites in Japan and Europe.

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  • Among other things, it means that "the Pasma Cosmology, "electromagnetic model", analysis & interpretation and conclusion" (whatever that might be) needs to account for all the (centuries-worth) observations of (classical) novae … the photometry, the spectroscopy, the light-curves, … the whole kit and kaboodle.

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  • This is a good target for time series photometry, and at its current brightness, we highly recommend using filters.

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  • "Deep CCD BV photometry of the poorly studied NGC 4815" , A&A.Sup.

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  • Pettersson estimated the cost of a Watson scintillation microscope, a comparison eye piece for scintillation photometry, two holoscopic objectives, and a number of scintillation screens and absorbing foils, to be 86 dollars, a considerable amount at the time. 65 In the Radium Institute, there was no previous experimental tradition with such an optical system.

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